In vitro bonding of adhesive resin to dental alloys and dentine.
The purpose of this in vitro investigation was to compare the shear bond strength of sandblasted, tin-plated and metal primed Type II gold alloy bonded to Ni-Cr alloy, as well as sandblasted Type II gold bonded to dentine, using two different adhesive resin cements. All bonding surfaces were treated with C&B-Metabond (Parkell, CB) or Imperva Dual (Shofu, ID), according to the manufacturers' instructions. In all, 20 sandblasted, 20 tin-plated and 20 metal-primed gold cylinders were bonded to Ni-Cr, and 20 sandblasted gold cylinders bonded to dentine. Bonds were stressed to failure using a shear load in an Instron testing machine. Data were calculated, statistically analysed (ANOVA and Student-t-test), and the fracture sites examined in a SEM. The CB and ID systems demonstrated significantly higher bond strengths (p < 0.01) when the gold was tin-plated, but CB demonstrated significantly lower bond strengths (p < 0.01) when the gold was pre-treated with metal primer. CB always demonstrated significantly higher metal (p < 0.01) and dentine (p < 0.05) bond strengths than ID.
van der Vyver
P J
PJ
Department of Restorative Dentistry, Faculty of Dentistry, University of Pretoria.
de Wet
F A
FA
D002858:Chromium Alloys; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents; D006047:Gold Alloys; D006801:Humans; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D013314:Stress, Mechanical; D013499:Surface Properties
D002858:Chromium Alloys; D017220:Dentin-Bonding Agents; D006047:Gold Alloys; D019279:Resin Cements